Answer :

The two components of the equation for the free energy stored in the proton gradient are called as concentration gradient and Voltage difference ( Electric potential )

The equation for the free energy stored in the proton gradient is

ΔG = 2.3 RTΔpH + FΔψ

ΔpH = H+ concentration gradient

Δψ = Voltage difference / Electric potential

The significance of concentration gradient and Voltage difference ( Electric potential ) being a separate entity in the equation is to provide energy and independent contribution to ATP synthesis.

Therefore, the two components of the equation for the free energy stored in the proton gradient are called as concentration gradient and Voltage difference ( Electric potential )

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